JP2019152891A - Image formation apparatus - Google Patents

Image formation apparatus Download PDF

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JP2019152891A
JP2019152891A JP2019117961A JP2019117961A JP2019152891A JP 2019152891 A JP2019152891 A JP 2019152891A JP 2019117961 A JP2019117961 A JP 2019117961A JP 2019117961 A JP2019117961 A JP 2019117961A JP 2019152891 A JP2019152891 A JP 2019152891A
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image forming
forming apparatus
power supply
paper
unit
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JP7014208B2 (en
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隆行 末廣
Takayuki Suehiro
隆行 末廣
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Fujifilm Business Innovation Corp
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Fuji Xerox Co Ltd
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Abstract

To provide an image formation apparatus that can have an electric power supply path formed shortly and also can be made compact in a height direction.SOLUTION: An image formation apparatus comprises: a housing; an image formation unit which is arranged detachably inside the housing, and has a power-supplied body and includes a development unit; a sheet conveyance path which is provided below the image formation unit in the gravitational direction, and conveys a sheet horizontally; a paper feed device which is provided below the sheet conveyance path, and stores sheets one over another and feeds the sheets; and a power supply substrate which is arranged below the development unit in a space sandwiched between the development unit of the image formation unit and the sheet conveyance path, does not include other sheet conveyance paths, and supplies electric power to the power-supplied body with an element arranged on the side of the sheet conveyance path.SELECTED DRAWING: Figure 4

Description

本発明は、画像形成装置に関する。   The present invention relates to an image forming apparatus.

本体の内部に略水平に設けられた用紙搬送路と、この用紙搬送路に設けられた画像形成部及び定着部と、用紙搬送路の一端から下方に湾曲された給紙路と、用紙搬送路の他端に接続された排紙路と、用紙搬送路の下方に配置されて多数枚の用紙を積層状態で収納する用紙収納部と、この用紙収納部の給紙路側の一端に回転自在に設けられた給紙ローラと、操作スイッチと表示部とが配列されて本体の外面に露出される操作パネルと回路基板とを互いに接続して共通の支持部材に装着してなり用紙搬送路と用紙収納部との間に設けられた動作制御部とよりなる画像形成装置が知られている（特許文献１）。   A sheet conveying path provided substantially horizontally inside the main body, an image forming unit and a fixing unit provided in the sheet conveying path, a sheet feeding path curved downward from one end of the sheet conveying path, and a sheet conveying path A paper discharge path connected to the other end of the paper, a paper storage section that is arranged below the paper transport path and stores a large number of sheets in a stacked state, and is freely rotatable at one end of the paper storage section on the paper feed path side. An operation panel and a circuit board, which are provided with a feed roller, an operation switch, and a display unit and are exposed on the outer surface of the main body, are connected to each other and mounted on a common support member. An image forming apparatus including an operation control unit provided between the storage unit and the storage unit is known (Patent Document 1).

特開平５−１１９５４９号公報Japanese Patent Laid-Open No. 5-119549

本発明は、給電経路を短く形成可能とすると共に、高さ方向の小型化を可能とする画像形成装置を提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming apparatus that can form a power feeding path short and can be downsized in the height direction.

前記課題を解決するために、請求項１に記載の画像形成装置は、
筐体と、
前記筐体の内部に着脱可能に配置され、被給電体を有し、現像ユニットを含む像形成ユニットと、
前記像形成ユニットの重力方向下方に設けられ、用紙を水平方向に搬送する用紙搬送路と、
前記用紙搬送路の下方に設けられ、用紙が重ねられて収容され、前記用紙を給紙する給紙装置と、
前記像形成ユニットの前記現像ユニットと前記用紙搬送路に挟まれた空間であって、他の用紙搬送路を含まない前記空間の、前記現像ユニットの下方に配置され、かつ素子が前記用紙搬送路側に配置される態様で前記被給電体に電力を供給する電源基板と、を備えた、
ことを特徴とする。 In order to solve the above problem, an image forming apparatus according to claim 1,
A housing,
An image forming unit that is detachably disposed within the housing, has a power supply, and includes a developing unit;
A paper conveyance path that is provided below the image forming unit in the gravity direction and conveys the paper in a horizontal direction;
A sheet feeding device that is provided below the sheet conveyance path, accommodates stacked sheets, and feeds the sheets;
The space between the developing unit of the image forming unit and the paper transport path, which is disposed below the developing unit in the space not including another paper transport path, and the element is on the paper transport path side A power supply board that supplies power to the power-supplied body in a manner arranged in
It is characterized by that.

請求項２記載の発明は、請求項１に記載の画像形成装置において、
前記用紙搬送路は、前記給紙装置とは別個に設けられ、用紙引き出し部により引き出された前記用紙をレジストローラ対のニップ部まで搬送する、
ことを特徴とする。 According to a second aspect of the present invention, in the image forming apparatus according to the first aspect,
The paper conveyance path is provided separately from the paper feeding device, and conveys the paper drawn by the paper drawing unit to a nip portion of a pair of registration rollers.
It is characterized by that.

請求項３記載の発明は、請求項１又は２に記載の画像形成装置において、
前記電源基板が前記素子と出力端子が配置された第１面と前記第１面と反対側の面である第２面を貫通する貫通孔を備え、前記貫通孔を介して、重力方向上方に配置された前記現像ユニットに電力を供給するものである、
ことを特徴とする。 According to a third aspect of the present invention, in the image forming apparatus according to the first or second aspect,
The power supply substrate includes a through hole penetrating a first surface on which the element and the output terminal are arranged and a second surface that is a surface opposite to the first surface, and the gravity direction upward via the through hole. Power is supplied to the arranged developing units.
It is characterized by that.

請求項４記載の発明は、請求項１又は２に記載の画像形成装置において、
前記筐体に固定され前記電源基板の前記素子が配置された第１面を支持する第２の枠体を備え、前記第２の枠体は、前記用紙搬送路の一部を形成するとともに、前記用紙搬送路の裏側に凹部を有し前記凹部に前記素子を収容する、
ことを特徴とする。 According to a fourth aspect of the present invention, in the image forming apparatus according to the first or second aspect,
A second frame that is fixed to the housing and supports a first surface on which the element of the power supply board is disposed; the second frame forms a part of the paper transport path; Having a recess on the back side of the paper transport path and housing the element in the recess;
It is characterized by that.

請求項５記載の発明は、請求項１ないし４のいずれか１項に記載の画像形成装置において、
前記第１の枠体及び前記第２の枠体が絶縁性の合成樹脂で形成されている、
ことを特徴とする。 The invention according to claim 5 is the image forming apparatus according to any one of claims 1 to 4,
The first frame and the second frame are formed of an insulating synthetic resin;
It is characterized by that.

請求項６記載の発明は、請求項１ないし５のいずれか１項に記載の画像形成装置において、
前記電源基板の一面であって、前記現像ユニットが配置された側の面は第１の枠体で覆われ、前記第１の枠体は、前記現像ユニットと前記電源基板とを仕切るように遮蔽している、
ことを特徴とする。 According to a sixth aspect of the present invention, in the image forming apparatus according to any one of the first to fifth aspects,
One surface of the power supply substrate, the surface on which the developing unit is disposed, is covered with a first frame, and the first frame is shielded so as to partition the developing unit and the power supply substrate. is doing,
It is characterized by that.

請求項１ないし６に記載の発明によれば、電源基板が像形成ユニットの下に配置されるので給電経路を短く形成可能とすると共に、電源基板の素子が凹凸のある用紙搬送路側に配置されるので高さ方向の小型化を可能とすることができる。   According to the first to sixth aspects of the present invention, since the power supply substrate is disposed under the image forming unit, the power feeding path can be formed short, and the elements of the power supply substrate are disposed on the uneven paper conveyance path side. Therefore, it is possible to reduce the size in the height direction.

画像形成装置の内部構成を示す断面模式図である。1 is a schematic cross-sectional view showing an internal configuration of an image forming apparatus. （ａ）は第１の枠体に保持された電源基板の素子側に視点をおいた斜視図、（ｂ）は電源基板と第１の枠体の分解斜視図である。(A) is the perspective view which looked at the element side of the power supply board hold | maintained at the 1st frame, (b) is a disassembled perspective view of a power supply board and a 1st frame. 電源基板の素子の配置側の平面模式図及び断面図である。It is the plane schematic diagram and sectional drawing on the arrangement | positioning side of the element of a power supply board. 電源基板と第１の枠体と第２の枠体の分解斜視図である。It is a disassembled perspective view of a power supply board, a 1st frame, and a 2nd frame. 第２の枠体が筐体に取り付けられた状態を示す斜視図である。It is a perspective view which shows the state with which the 2nd frame was attached to the housing | casing. 第２の枠体が筐体に取り付けられた状態を示す筐体の外面側に視点をおいた斜視図である。It is the perspective view which put a viewpoint on the outer surface side of the housing | casing which shows the state with which the 2nd frame was attached to the housing | casing. 電源装置が筐体に取り付けられた状態を示す斜視図である。It is a perspective view which shows the state in which the power supply device was attached to the housing | casing. 電源装置から被給電体までの給電経路を説明するための断面模式図である。It is a cross-sectional schematic diagram for demonstrating the electric power feeding path | route from a power supply device to a to-be-powered body.

次に図面を参照しながら、以下に実施形態及び具体例を挙げ、本発明を更に詳細に説明するが、本発明はこれらの実施形態及び具体例に限定されるものではない。
また、以下の図面を使用した説明において、図面は模式的なものであり、各寸法の比率等は現実のものとは異なることに留意すべきであり、理解の容易のために説明に必要な部材以外の図示は適宜省略されている。 Next, the present invention will be described in more detail with reference to the drawings with reference to embodiments and specific examples. However, the present invention is not limited to these embodiments and specific examples.
Also, in the description using the following drawings, it should be noted that the drawings are schematic and the ratio of each dimension and the like are different from the actual ones, and are necessary for the description for easy understanding. Illustrations other than the members are omitted as appropriate.

（１）画像形成装置の全体構成及び動作
図１は本実施形態に係る画像形成装置１の内部構成を示す断面模式図である。
以下、図面を参照しながら、画像形成装置１の全体構成及び動作を説明する。 (1) Overall Configuration and Operation of Image Forming Apparatus FIG. 1 is a schematic cross-sectional view showing the internal configuration of the image forming apparatus 1 according to this embodiment.
Hereinafter, the overall configuration and operation of the image forming apparatus 1 will be described with reference to the drawings.

画像形成装置１は、筐体Ｆ内に、制御装置１０、給紙装置２０、像形成ユニットを構成する感光体ユニット３０及び現像ユニット４０、転写装置５０、定着装置６０、電源装置１００を備えて構成されている。画像形成装置１の上面（Ｚ方向）には、画像が記録された用紙Ｐが排出・収容される排出トレイ１ａが形成されている。   The image forming apparatus 1 includes a control device 10, a paper feeding device 20, a photoconductor unit 30 and a developing unit 40 constituting an image forming unit, a transfer device 50, a fixing device 60, and a power supply device 100 in a housing F. It is configured. On the upper surface (Z direction) of the image forming apparatus 1, there is formed a discharge tray 1a for discharging and storing the paper P on which an image is recorded.

制御装置１０は、画像形成装置１の動作を制御する画像形成装置制御部１１と、印刷処理要求に応じた画像データを準備するコントローラ部１２、露光装置ＬＨの点灯を制御する露光制御部１３等を有する。   The control device 10 includes an image forming device control unit 11 that controls the operation of the image forming device 1, a controller unit 12 that prepares image data in response to a print processing request, an exposure control unit 13 that controls lighting of the exposure device LH, and the like. Have

コントローラ部１２は、外部の情報送信装置（例えばパーソナルコンピュータ等）から入力された印刷情報を潜像形成用の画像情報に変換して予め設定されたタイミングで、駆動信号を露光装置ＬＨに出力する。本実施形態の露光装置ＬＨは、複数の発光素子（ＬＥＤ：Light Emitting Diode）が主走査方向に沿って線状に配列されたＬＥＤヘッドにより構成されている。   The controller unit 12 converts print information input from an external information transmission device (for example, a personal computer) into image information for forming a latent image, and outputs a drive signal to the exposure device LH at a preset timing. . The exposure apparatus LH of the present embodiment is configured by an LED head in which a plurality of light emitting elements (LEDs) are arranged linearly along the main scanning direction.

画像形成装置１の底部には、給紙装置２０が設けられている。給紙装置２０は、用紙積載板２１を備え、用紙積載板２１の上面には多数の記録媒体としての用紙Ｐが積載される。用紙積載板２１に積載され、規制板（不図示）で幅方向位置が決められた用紙Ｐは、上側から１枚ずつ用紙引き出し部２２により横方向（Ｘ方向）に引き出された後、レジストローラ対２３のニップ部まで搬送される。
給紙装置２０の上方には、第２給紙装置２０Ａが設けられている。第２給紙装置２０Ａは、用紙搬送路２７を介して、用紙引き出し部２５により引き出された用紙Ｐをレジストローラ対２３のニップ部まで搬送する。 A paper feeding device 20 is provided at the bottom of the image forming apparatus 1. The sheet feeding device 20 includes a sheet stacking plate 21, and a plurality of sheets P as recording media are stacked on the upper surface of the sheet stacking plate 21. The paper P loaded on the paper stacking plate 21 and whose position in the width direction is determined by a regulating plate (not shown) is pulled out one by one from the top by the paper pulling unit 22 in the horizontal direction (X direction), and then registered. It is conveyed to the nip portion of the pair 23.
Above the paper feeding device 20, a second paper feeding device 20A is provided. The second paper feeding device 20 </ b> A conveys the paper P drawn by the paper drawing unit 25 to the nip portion of the registration roller pair 23 via the paper conveyance path 27.

感光体ユニット３０は、給紙装置２０の上方（Ｚ方向）に、それぞれが並列して設けられ、回転駆動する感光体ドラム３１を備えている。感光体ドラム３１の回転方向にそって、帯電ローラ３２、露光装置ＬＨ、現像ユニット４０、一次転写ローラ５２、クリーニングブレード３４が配置されている。帯電ローラ３２には、帯電ローラ３２の表面をクリーニングするクリーニングローラ３３が対向、接触して配置されている。   The photoconductor unit 30 includes a photoconductor drum 31 that is provided in parallel above the sheet feeding device 20 (Z direction) and is driven to rotate. A charging roller 32, an exposure device LH, a developing unit 40, a primary transfer roller 52, and a cleaning blade 34 are arranged along the rotation direction of the photosensitive drum 31. A cleaning roller 33 for cleaning the surface of the charging roller 32 is disposed opposite to and in contact with the charging roller 32.

現像ユニット４０は、内部に現像剤が収容される現像ハウジング４１を有する。現像ハウジング４１内には、感光体ドラム３１に対向して配置された他の被給電体としての現像ローラ４２と、この現像ローラ４２の背面側斜め下方には現像剤を現像ローラ４２側へ撹拌搬送する一対のオーガ４４、４５が配設されている。現像ローラ４２には、現像剤の層厚を規制する層規制部材４６が近接配置されている。
現像ユニット４０各々は、現像ハウジング４１に収容される現像剤を除いて同様に構成され、それぞれがイエロー（Ｙ）、マゼンタ（Ｍ）、シアン（Ｃ）、黒（Ｋ）のトナー像を形成する。 The developing unit 40 has a developing housing 41 in which a developer is accommodated. In the developing housing 41, a developing roller 42 as another power receiving member disposed opposite to the photosensitive drum 31, and developer is agitated to the developing roller 42 side obliquely below the back side of the developing roller 42. A pair of augers 44 and 45 for conveyance are provided. A layer regulating member 46 that regulates the layer thickness of the developer is disposed in proximity to the developing roller 42.
Each of the developing units 40 is configured in the same manner except for the developer contained in the developing housing 41, and each forms a toner image of yellow (Y), magenta (M), cyan (C), and black (K). .

回転する感光体ドラム３１の表面は、帯電ローラ３２により帯電され、露光装置ＬＨから出射する潜像形成光により静電潜像が形成される。感光体ドラム３１上に形成された静電潜像は現像ローラ４２によりトナー像として現像される。   The surface of the rotating photosensitive drum 31 is charged by the charging roller 32, and an electrostatic latent image is formed by the latent image forming light emitted from the exposure device LH. The electrostatic latent image formed on the photosensitive drum 31 is developed as a toner image by the developing roller 42.

転写装置５０は、各感光体ユニット３０の感光体ドラム３１にて形成された各色トナー像が多重転写される中間転写ベルト５１、各感光体ユニット３０にて形成された各色トナー像を中間転写ベルト５１に順次転写（一次転写）する一次転写ローラ５２、中間転写ベルト５１上に重畳して転写された各色トナー像を用紙Ｐに一括転写（二次転写）する二次転写ローラ５３から構成されている。   The transfer device 50 includes an intermediate transfer belt 51 to which each color toner image formed on the photoconductive drum 31 of each photoconductor unit 30 is transferred, and each color toner image formed on each photoconductor unit 30 to the intermediate transfer belt. 51, a primary transfer roller 52 that sequentially transfers (primary transfer) to 51, and a secondary transfer roller 53 that collectively transfers (secondary transfer) each color toner image transferred on the intermediate transfer belt 51 onto the paper P. Yes.

電源装置１００は、第２給紙装置２０Ａの上方（Ｚ方向）で感光体ユニット３０、現像ユニット４０の下方（−Ｚ方向）に配置され、被給電体としての帯電ローラ３２、現像ローラ４２、一次転写ローラ５２、二次転写ローラ５３等に電圧を印加する。   The power supply device 100 is disposed above the second paper feeding device 20A (Z direction) and below the photosensitive unit 30 and the developing unit 40 (−Z direction), and includes a charging roller 32, a developing roller 42, A voltage is applied to the primary transfer roller 52, the secondary transfer roller 53, and the like.

各感光体ユニット３０の感光体ドラム３１に形成された各色トナー像は、画像形成装置制御部１１により制御される電源装置１００から所定の転写電圧が印加された一次転写ローラ５２により中間転写ベルト５１上に順次静電転写（一次転写）され、各色トナーが重畳された重畳トナー像が形成される。   Each color toner image formed on the photoconductive drum 31 of each photoconductive unit 30 is transferred to an intermediate transfer belt 51 by a primary transfer roller 52 to which a predetermined transfer voltage is applied from a power supply device 100 controlled by the image forming apparatus control unit 11. The toner images are sequentially electrostatically transferred (primary transfer), and a superimposed toner image in which toners of respective colors are superimposed is formed.

中間転写ベルト５１上の重畳トナー像は、中間転写ベルト５１の移動に伴って二次転写ローラ５３が配置された領域（二次転写部Ｔ）に搬送される。重畳トナー像が二次転写部Ｔに搬送されると、そのタイミングに合わせて給紙装置２０から用紙Ｐが二次転写部Ｔに供給される。そして、二次転写ローラ５３には、画像形成装置制御部１１により制御される電源装置１００から所定の転写電圧が印加され、レジストローラ対２３から送り出され、搬送ガイドにより案内された用紙Ｐに中間転写ベルト５１上の多重トナー像が一括転写される。   The superimposed toner image on the intermediate transfer belt 51 is conveyed to a region (secondary transfer portion T) where the secondary transfer roller 53 is disposed as the intermediate transfer belt 51 moves. When the superimposed toner image is conveyed to the secondary transfer unit T, the paper P is supplied from the paper feeding device 20 to the secondary transfer unit T in accordance with the timing. A predetermined transfer voltage is applied to the secondary transfer roller 53 from the power supply device 100 controlled by the image forming apparatus control unit 11, and the intermediate transfer medium P is fed from the registration roller pair 23 and guided by the conveyance guide. Multiple toner images on the transfer belt 51 are collectively transferred.

感光体ドラム３１表面の残留トナーは、クリーニングブレード３４により除去され、廃現像剤収容部に回収される。感光体ドラム３１の表面は、帯電ローラ３２により再帯電される。尚、クリーニングブレード３４で除去しきれず帯電ローラ３２に付着した残留物は、帯電ローラ３２に接触して回転するクリーニングローラ３３表面に捕捉され、蓄積される。   Residual toner on the surface of the photosensitive drum 31 is removed by the cleaning blade 34 and collected in the waste developer container. The surface of the photosensitive drum 31 is recharged by the charging roller 32. Residues that cannot be completely removed by the cleaning blade 34 and adhere to the charging roller 32 are captured and accumulated on the surface of the cleaning roller 33 that rotates in contact with the charging roller 32.

定着装置６０は、加熱モジュール６１と加圧モジュール６２を有し、加熱モジュール６１と加圧モジュール６２の圧接領域によって定着ニップ部Ｎ（定着領域）が形成される。   The fixing device 60 includes a heating module 61 and a pressure module 62, and a fixing nip portion N (fixing area) is formed by a pressure contact area between the heating module 61 and the pressure module 62.

転写装置５０においてトナー像が転写された用紙Ｐは、トナー像が未定着の状態で搬送ガイドを経由して定着装置６０に搬送される。定着装置６０に搬送された用紙Ｐは、一対の加熱モジュール６１と加圧モジュール６２により、圧着と加熱の作用でトナー像が定着される。
定着トナー像が形成された用紙Ｐは、搬送ローラ対６８を介して排出ローラ対６９から画像形成装置１上面の排出トレイ１ａに排出される。 The sheet P on which the toner image is transferred in the transfer device 50 is conveyed to the fixing device 60 via the conveyance guide in a state where the toner image is not fixed. The toner image is fixed on the sheet P conveyed to the fixing device 60 by a pair of heating module 61 and pressure module 62 by the action of pressing and heating.
The sheet P on which the fixing toner image is formed is discharged from the discharge roller pair 69 to the discharge tray 1 a on the upper surface of the image forming apparatus 1 via the conveyance roller pair 68.

（２）電源装置の構成と配置
（２．１）電源装置の構成
図２（ａ）は第１の枠体１２０に保持された電源基板１１０の素子側に視点をおいた斜視図、（ｂ）は電源基板１１０と第１の枠体１２０の分解斜視図、図３は電源基板１１０の素子の配置側の平面模式図及び断面図である。
以下、図面を参照しながら本実施形態に係る電源装置１００の構成について説明する。 (2) Configuration and Arrangement of Power Supply Device (2.1) Configuration of Power Supply Device FIG. 2A is a perspective view with a viewpoint on the element side of the power supply substrate 110 held by the first frame 120, (b) ) Is an exploded perspective view of the power supply substrate 110 and the first frame body 120, and FIG. 3 is a schematic plan view and a cross-sectional view of the element arrangement side of the power supply substrate 110.
Hereinafter, the configuration of the power supply apparatus 100 according to the present embodiment will be described with reference to the drawings.

電源装置１００は、電源基板１１０と、第１の枠体１２０と、接続端子１４０とを備えて構成されている。   The power supply device 100 includes a power supply substrate 110, a first frame body 120, and connection terminals 140.

図２に示すように、電源基板１１０の第１面１１０ａには、感光体ユニット３０、現像ユニット４０、一次転写ローラ５２、二次転写ローラ５３に給電される電圧を発生させる変圧器（トランス）や抵抗、蓄電器（コンデンサ）等の素子が配置されている。   As shown in FIG. 2, a transformer (transformer) that generates a voltage to be supplied to the photosensitive unit 30, the developing unit 40, the primary transfer roller 52, and the secondary transfer roller 53 is formed on the first surface 110 a of the power supply substrate 110. Elements such as a resistor, a capacitor, and a capacitor are arranged.

図３に示すように、接続端子１４０と電気接続される領域には、第１面１１０ａと第２面１１０ｂを貫通する貫通孔１１１が形成され、貫通孔１１１を跨いで２本の出力端子１１２が配置されている。   As shown in FIG. 3, a through hole 111 penetrating the first surface 110 a and the second surface 110 b is formed in a region electrically connected to the connection terminal 140, and the two output terminals 112 straddle the through hole 111. Is arranged.

接続端子１４０は、電源基板１１０に電気的に接続されて被給電体としての感光体ユニット３０、現像ユニット４０に給電する。接続端子１４０は、線材からなり、一端側が電源基板１１０の出力端子１１２に付勢されて接触する接触部としての圧縮コイルバネ部１４１を有している。他端側は、感光体ユニット３０、現像ユニット４０の給電部に接触するトーションコイルバネ部１４２を有している。   The connection terminal 140 is electrically connected to the power supply substrate 110 and supplies power to the photoconductor unit 30 and the development unit 40 as power supply bodies. The connection terminal 140 is made of a wire, and has a compression coil spring portion 141 as a contact portion that is urged and contacted with the output terminal 112 of the power supply substrate 110 at one end side. The other end side has a torsion coil spring portion 142 that comes into contact with the power supply portion of the photoconductor unit 30 and the developing unit 40.

電源基板１１０の第２面１１０ｂは、沿面放電を防止するために、電源基板１１０の第２面１１０ｂ側に比べて、平面視で形状が大きくなるように絶縁性の合成樹脂により矩形状に形成された第１の枠体１２０で保持されている。   The second surface 110b of the power supply substrate 110 is formed in a rectangular shape with an insulating synthetic resin so as to be larger in plan view than the second surface 110b side of the power supply substrate 110 in order to prevent creeping discharge. The first frame body 120 is held.

（２．２）電源装置の配置
図４は電源基板１１０と第１の枠体１２０と第２の枠体１３０の分解斜視図、図５は第２の枠体１３０が筐体Ｆに取り付けられた状態を示す斜視図、図６は第２の枠体１３０が筐体Ｆに取り付けられた状態を示す筐体Ｆの外面側に視点をおいた斜視図、図７は電源装置１００が筐体Ｆに取り付けられた状態を示す斜視図、図８は電源装置１００から被給電体までの給電経路を説明するための断面模式図である。
以下、図面を参照しながら本実施形態に係る電源装置１００の配置について説明する。 (2.2) Arrangement of Power Supply Device FIG. 4 is an exploded perspective view of the power supply substrate 110, the first frame body 120, and the second frame body 130, and FIG. 5 shows the second frame body 130 attached to the housing F. FIG. 6 is a perspective view showing the state where the second frame 130 is attached to the housing F, and FIG. 7 is a perspective view with the viewpoint on the outer surface side of the housing F, and FIG. FIG. 8 is a schematic cross-sectional view for explaining a power feeding path from the power supply apparatus 100 to the power supply body.
Hereinafter, the arrangement of the power supply device 100 according to the present embodiment will be described with reference to the drawings.

図４に示すように、電源基板１１０の第１面１１０ａは、第２給紙装置２０Ａ（図１参照）の用紙搬送路２７の上面側の案内面を形成する第２の枠体１３０で支持されている。   As shown in FIG. 4, the first surface 110a of the power supply substrate 110 is supported by a second frame 130 that forms a guide surface on the upper surface side of the sheet conveyance path 27 of the second sheet feeding device 20A (see FIG. 1). Has been.

図５、図６に示すように、第２の枠体１３０は筐体Ｆの底面側（−Ｚ方向）の平面視略中央部に配置されている。第２の枠体１３０の上面１３０ａ側は、用紙搬送路２７の断面形状に応じた凹部１３１を有し（図３参照）、第１の枠体１２０に第２面１１０ｂ側を支持された電源基板１１０の第１面１１０ａに配置された素子が収容される（図４参照）。   As shown in FIGS. 5 and 6, the second frame body 130 is disposed at a substantially central portion in plan view on the bottom surface side (−Z direction) of the housing F. The upper surface 130a side of the second frame 130 has a recess 131 corresponding to the cross-sectional shape of the paper transport path 27 (see FIG. 3), and the first frame 120 supports the second surface 110b side. Elements disposed on the first surface 110a of the substrate 110 are accommodated (see FIG. 4).

第２の枠体１３０の一端側（−Ｙ方向）には電源基板１１０の出力端子１１３（図２に図示）と被給電体としての一次転写ローラ５２、二次転写ローラ５３を接続するコネクタ１５０が係合されている。   A connector 150 that connects an output terminal 113 (shown in FIG. 2) of the power supply substrate 110 to the primary transfer roller 52 and the secondary transfer roller 53 as a power supply body on one end side (−Y direction) of the second frame 130. Are engaged.

図７に示すように、筐体Ｆに取り付けられた電源装置１００は、上方（Ｚ方向）が電源基板１１０の第２面１１０ｂよりも平面視で形状が大きく形成された第１の枠体１２０で覆われ、上方（Ｚ方向）に配置される感光体ユニット３０、現像ユニット４０と電源基板１１０とを仕切るように遮蔽している。   As shown in FIG. 7, the power supply device 100 attached to the housing F has a first frame body 120 whose upper side (Z direction) is formed larger in plan view than the second surface 110 b of the power supply substrate 110. The photoconductor unit 30, the developing unit 40, and the power supply substrate 110 arranged in the upper direction (Z direction) are shielded so as to partition.

このように配置される電源装置１００を備えた画像形成装置１においては、図８に模式的に示すように、感光体ユニット３０が装置本体に装着されるときは、帯電ローラ３２と接触する導電体の給電プレート３５が電源装置１００に設けられた接続端子１４０のトーションコイルバネ部１４２と直接接触して電源基板１１０から給電される。
そのために、電源装置１００から被給電体への高圧の給電経路を短く形成することができる。 In the image forming apparatus 1 including the power supply device 100 arranged in this way, as schematically shown in FIG. 8, when the photosensitive unit 30 is mounted on the apparatus main body, the conductive material that contacts the charging roller 32. The body power supply plate 35 is in direct contact with the torsion coil spring portion 142 of the connection terminal 140 provided in the power supply device 100 and is supplied with power from the power supply substrate 110.
Therefore, a high-voltage power supply path from the power supply device 100 to the power supply body can be formed short.

高圧電源としての電源装置１００は、電源基板１１０の第１面１１０ａに配置された素子が、内側に用紙搬送路２７の用紙案内面を有する第２の枠体１３０の用紙搬送路２７の断面形状に応じた凹部１３１に収容されて用紙搬送路２７上に直接固定されている。
そのために、電源装置１００の上方で配置される像形成ユニットとしての感光体ユニット３０、現像ユニット４０の筐体Ｆ内での上下方向（Ｚ方向）の配置位置が、電源基板１１０の一面側に嵩高く突出した素子の制約を受けることがなく、装置高さを低く維持することができる。 In the power supply device 100 as a high-voltage power supply, the cross-sectional shape of the sheet conveyance path 27 of the second frame 130 in which the elements arranged on the first surface 110a of the power supply substrate 110 have the sheet guide surface of the sheet conveyance path 27 inside. And is directly fixed on the paper transport path 27.
Therefore, the arrangement position in the vertical direction (Z direction) in the housing F of the photoconductor unit 30 and the developing unit 40 as the image forming unit arranged above the power supply device 100 is on one surface side of the power supply substrate 110. The height of the device can be kept low without being restricted by a bulky protruding element.

また、素子の半田固定面となる電源基板１１０の第２面１１０ｂは、電源基板１１０の第２面１１０ｂ側に比べて、平面視で形状が大きくなるように絶縁体により矩形状に形成された第１の枠体１２０で保持されている。
そして、電源装置１００は、平面視で筐体Ｆの中央部で用紙搬送路２７の用紙案内面を有する第２の枠体１３０に支持されて固定されている。
そのために、装置本体の背面側（−Ｙ方向）に配置される場合に比して、装置幅を狭く維持することができる。 In addition, the second surface 110b of the power supply substrate 110, which is a solder fixing surface of the element, is formed in a rectangular shape by an insulator so as to be larger in plan view than the second surface 110b side of the power supply substrate 110. It is held by the first frame body 120.
The power supply device 100 is supported and fixed by the second frame 130 having the paper guide surface of the paper transport path 27 at the center of the housing F in plan view.
Therefore, the apparatus width can be kept narrow compared to the case where it is arranged on the back side (−Y direction) of the apparatus main body.

その結果、電源装置１００から被給電体への高圧の給電経路を短く形成可能とし、装置高さを低くかつ装置幅を狭く維持して小型化することができる。   As a result, a high-voltage power supply path from the power supply apparatus 100 to the power supply body can be formed short, and the apparatus can be downsized while maintaining the apparatus height low and the apparatus width narrow.

１・・・画像形成装置
１０・・・制御装置
２０・・・給紙装置
２０Ａ・・・第２給紙装置
２２、２５・・・用紙引き出し部
２７・・・用紙搬送路
３０・・・感光体ユニット
４０・・・現像ユニット
５０・・・転写装置
６０・・・定着装置
１００・・・電源装置
１１０・・・電源基板
１１０ａ・・・第１面
１１０ｂ・・・第２面
１１２、１１３・・・出力端子
１２０・・・第１の枠体
１３０・・・第２の枠体
１３１・・・凹部
１４０・・・接続端子
１５０・・・コネクタ DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus 10 ... Control apparatus 20 ... Paper feeding apparatus 20A ... 2nd paper feeding apparatus 22, 25 ... Paper drawer part 27 ... Paper conveyance path 30 ... Photosensitive Body unit 40 ... developing unit 50 ... transfer device 60 ... fixing device 100 ... power supply device 110 ... power supply substrate 110a ... first surface 110b ... second surface 112, 113 ..Output terminal 120 ... first frame 130 ... second frame 131 ... concave
140 ... connection terminal 150 ... connector

Claims (6)

筐体と、
前記筐体の内部に着脱可能に配置され、被給電体を有し、現像ユニットを含む像形成ユニットと、
前記像形成ユニットの重力方向下方に設けられ、用紙を水平方向に搬送する用紙搬送路と、
前記用紙搬送路の下方に設けられ、用紙が重ねられて収容され、前記用紙を給紙する給紙装置と、
前記像形成ユニットの前記現像ユニットと前記用紙搬送路に挟まれた空間であって、他の用紙搬送路を含まない前記空間の、前記現像ユニットの下方に配置され、かつ素子が前記用紙搬送路側に配置される態様で前記被給電体に電力を供給する電源基板と、を備えた、
ことを特徴とする画像形成装置。 A housing,
An image forming unit that is detachably disposed within the housing, has a power supply, and includes a developing unit;
A paper conveyance path that is provided below the image forming unit in the gravity direction and conveys the paper in a horizontal direction;
A sheet feeding device that is provided below the sheet conveyance path, accommodates stacked sheets, and feeds the sheets;
The space between the developing unit of the image forming unit and the paper transport path, which is disposed below the developing unit in the space not including another paper transport path, and the element is on the paper transport path side A power supply board that supplies power to the power-supplied body in a manner arranged in
An image forming apparatus. 前記用紙搬送路は、前記給紙装置とは別個に設けられ、用紙引き出し部により引き出された前記用紙をレジストローラ対のニップ部まで搬送する、
ことを特徴とする請求項１に記載の画像形成装置。 The paper conveyance path is provided separately from the paper feeding device, and conveys the paper drawn by the paper drawing unit to a nip portion of a pair of registration rollers.
The image forming apparatus according to claim 1. 前記電源基板が前記素子と出力端子が配置された第１面と前記第１面と反対側の面である第２面を貫通する貫通孔を備え、前記貫通孔を介して、重力方向上方に配置された前記現像ユニットに電力を供給するものである、
ことを特徴とする請求項１又は２に記載の画像形成装置。 The power supply substrate includes a through hole penetrating a first surface on which the element and the output terminal are arranged and a second surface that is a surface opposite to the first surface, and the gravity direction upward via the through hole. Power is supplied to the arranged developing units.
The image forming apparatus according to claim 1, wherein the image forming apparatus is an image forming apparatus. 前記筐体に固定され前記電源基板の前記素子が配置された第１面を支持する第２の枠体を備え、前記第２の枠体は、前記用紙搬送路の一部を形成するとともに、前記用紙搬送路の裏側に凹部を有し前記凹部に前記素子を収容する、
ことを特徴とする請求項１又は２に記載の画像形成装置。 A second frame that is fixed to the housing and supports a first surface on which the element of the power supply board is disposed; the second frame forms a part of the paper transport path; Having a recess on the back side of the paper transport path and housing the element in the recess;
The image forming apparatus according to claim 1, wherein the image forming apparatus is an image forming apparatus. 前記第１の枠体及び前記第２の枠体が絶縁性の合成樹脂で形成されている、
ことを特徴とする請求項１ないし４のいずれか１項に記載の画像形成装置。 The first frame and the second frame are formed of an insulating synthetic resin;
The image forming apparatus according to claim 1, wherein the image forming apparatus is an image forming apparatus. 前記電源基板の一面であって、前記現像ユニットが配置された側の面は第１の枠体で覆われ、前記第１の枠体は、前記現像ユニットと前記電源基板とを仕切るように遮蔽している、
ことを特徴とする請求項１ないし５のいずれか１項に記載の画像形成装置。 One surface of the power supply substrate, the surface on which the developing unit is disposed, is covered with a first frame, and the first frame is shielded so as to partition the developing unit and the power supply substrate. is doing,
The image forming apparatus according to claim 1, wherein the image forming apparatus is an image forming apparatus.
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